Best way to achieve floaty bouncy physics?
I realize that my first answer may be buggy (or at least I need to fix the issue), so here are 2 alternatives, with or without addon, I don't know if it will fit your needs though, as you ask for realism:
With the Wiggle Bones addon:

Create your mesh and armature. Download the Wiggle Bones addon created by Shteeve here. In Pose mode, select each of the ear bone and go in the Properties panel &gt; Bone and enable the Wiggle Bone option, play with the parameters.


Without addon:

Create an edge, each of its vertex must stick to each bone's head and tail. Assign it a vertex group, the bottom vertex must have a weight of 1, the second a weight of 0.7, the last one a weight or 0.2 or 0.1.
Give this edge a Physics &gt; Cloth and in the Physics Shape panel, choose the group as Pin Group.
Create an empty for each vertex, parent each empty to its vertex (select the empty, shift select the edge, go in Edit mode, press CtrlP &gt; Make Vertex Parent).



Give each bone an IK constraint and give it as Target the empty its pointing to. Choose a Chain Length of 1.
Parent the edge to the head bone.